Michel Louis Bonaventure de Mercastel
- Born on March 24, 1719 in Baillolet
- Baptized the next day in this municipality
Parents
- Charles de Mercastel (1688 - 1772), capitaine d'infanterie
- Angélique de Chevestre de Beauchesne ( - 1723)
Family
- Married on November 26, 1740 in Bouvaincourt-sur-Bresle, with Catherine Chrétienne Picquet, dame du Belloy